Shuttle tension



June 7, 1927. 1,631,305

a. BRAHS SHUTTLE TENSION Filed Nov. 17, 1936 INVENTOR WITNESS (3e01- eBrahs, WM BY A M I 'ATTORNEY- Patented June 7, 1927.

GEORGE BRAHS, OF PATERSON, NEW JERSEY.

SHUTTLE TENSION.

Application filed November 17, 1926. Serial No. 148,969.

This invention relates to shuttle tension devices of the class characterized by a springactuated lever, usually of wire, having a series of guides to receive the thread and arranged'to alternate with a series of guides fixed in the shuttle, the spring acting normally to hold the lever withdrawn from the fixed series of guides so that the thread extends back and forth zig-zag fashion from one to the other series. I aim by this invention principally to avoid forming the guides of the device by twisting portions of the wire composing it.

In the drawing,

Fig. 1 is a longitudinal section of a shuttle having one form of the improved tension de vice therein; a

Fig. 2 is a perspective view of this form of the tension device, the fixed guides and thread;

Fig. 3 is a side elevation of such form;

Fig. 4C is a plan of the wire and the receiving part of the press by which the guides of such formare produced;

Fig. 5 is an end elevation of said wire and the parts of the press;

Fig. 6 is a plan of the wire and the receiv ing part of the press by which the other form of the device is produced;

Figs. 7 and 8 are, respectively, side elevations of theguide portion and the entire device according to this second form, a certain template appearing in Fig. 7 and Fig. 9 is an end elevation of such second form.

1 is the shuttle and 2 a line of parallel pins arranged therein in its cavity 3 and forming the fixed series of guides for the thread A. at is the pin on which the fulcrum portion of the tension device is mounted. I shall now describe the guiding part of each form shown.

Figs. 1 to 5: Here said part is formed preferably by the following method A piece of strip material, as wire, is for a suitable part of its length bent to produce a succession of reverse bends 5 of about equal length and width, and all in the same plane, resulting in the formation of a zig-zag portion as shown by Fig. 4. Such portion is then placed on the die or receiving member 6 of a press in which such member has a groove 7 of suitable width and so that each bend extends transversely of the groove. Thereupon the male member 8 of the'press, which opposite -member has a rectangular entering portion (Fig. 5), is made to force such portion into member 6 of the press, which results in the succession of bends being bent transversely of themselves so as to form a skeleton threadchannel consisting of a succession of U- shaped guides 9 all in line and joined by staggered connectors 10. Since in the present example the acting portion of member 8 is substantially rectangular this latter bending occurs on two parallel lines and each guide 9 has a straight cross-bar forming a thread-guide proper 9 the several bars forming the bottom of the skeleton threadchannel; Each of these bars, as will appear, is substantially parallel with the axis of the fulcrum portion (to be described) of the completed tension device.

Figs. 6 to 9: Here the method of forming the guiding part is similar to that already described excepting that the bends 11 in this case are made longer than the bends 5 above referred to so that when the resulting zigzag portion (compare Figs. & and 6) is subjected to the action of suitable press members, as 6 and 8 already described, the sides or legs of each U-shaped guide 12 (Fig. 9) formed will be higher or longer than those of the guides 9; whereupon as a supplemental step the extremities of said bends are bent toward each other in overhanging relation to the channel, as indicated at 13 in Fig. 7, as by placing a template 1 1 in the channel of the succession of guides (Fig. 7) and inwardly bending all the portions 13 of the wire which project above it, such portions of course on one side of such succession 0 guides alternating with those on the other. This may be done in such a way, as shown in Figs. 7 and 9, as fully to close the other.

wise open side of the channel,preventing any possibility of escape of the thread.

(In the form shown in Figs. 1 to 5 the bends 5 have angular extremities, but in the other form they have outwardly curved extremities, whereby'those onone side will mesh nicely into those on the other- I Fig. 7).

The device in either form is equipped with a fulcrum portion 15 formed, say, in the usual way by bending the wire into a coil, and this coil has its axis parallel with the bars 9 (or 12*) of the guides 9 (or 12) also with an arm 16 which may be one end of such coil left projecting and provided with an eye 17 to receive one end of an elastic band 18 fastened in the shuttle, as to the pin or screw 19.

As shown by Fig. 4 any given length of wire may be previously formed at intervals with the sets of bends 5 (or 11) and fed to the press for the channelling operation in integral form, to be cut up into the proper lengths as before forming the fulcrum portions and arms.

When the device is positioned in the shuttle that side of the device which may be said to form the bottom of its channel, composed of the guidesproper or cross-bars 9 (or 12 of the guides 9 (or 12), adjoins the 'series of fixed guides 2, the arrangement being such that guides 9 (or 12) can move into alternating relation to the fixed guides as Fig. 1 shows by dotted lines.

Having thus fully described my invention what I claim and desire to secure by Letters Patent is:

l. A tension lever for a shuttle tension device of the class described consisting of a piece of strip material having a fulcrum portion and bent into. a succession of reverse bends all of which are also bent transversely on two substantially parallel lines to form together a skeleton thread-channel, each of the portions of the strip between said lines being substantially straight and parallel with the axis of said fulcrum portion and forming a guide-proper for contact by the thread.

2. A tension lever for a shuttle tension device of the class described consisting of a piece of strip material having a fulcrum portion and bent into a succession of reverse bends all of which are also bent transversely to form together a skeleton thread-channel and have their extremities bent toward each other in overhanging relation to such thread-channel.

In testimony whereof I affix my signature.

GEORGE Brian s. 

